I'm a little confused. I have a 4X4X6.5 Tent in a bedroom. I have a small desktop fan blowing 24x7 as well as a ceiling fan blowing 24x7. I have been having some serious heat problems. If I zip up the tent so that it is light proof. Temps will reach 100+ degrees. If I leave the front of the tent unzipped it will get to 85 degrees. So today I went out and purchased a new light hood. I purchased a 6" vented air cooled hood and a 6" 465 CFM fan. I have it all hooked up with the fan sucking air through the hood and pushing the air through the ducting and out of my bedroom window. Long story short my temps aren't even going down one single degree. I'm still stuck at 85 degrees. If I put my hand over the vent on the light that is open I can feel quite a bit of air sucking through it; however if I move my hand two or three inches from the hood there is nothing. Edit: Forgot to mention the light is a 400 Watt HPS. I have a 1000 Watt light I was going to use for flowering, but at this point I'm afraid to. Here is a picture of what I have.